execute unless data storage vs:system chain.list[1] run title @a title [{"selector": "@s","color": "aqua"},{"text": " 发起了连锁!","color": "yellow"}]
execute if data storage vs:system chain.list[1] run title @a title [{"selector": "@s","color": "aqua"},{"text": " 继续连锁!","color": "yellow"}]

title @a subtitle {"nbt": "chain.subtitle","storage": "vs:system","interpret": true}
playsound block.dispenser.dispense master @a ~ ~ ~ 999999999.9 1.0

function vs:chain/push/title_modify with storage vs:system chain.subtitle[-1]